Kirkland Flaxseed Oil 1300mg 240softgels - NPN 80027309  Flaxseed oil is nature's best plant source of omega-3 essential fatty acids. Supplements rich in omega-3s support the cardiovascular system, skin, brain and joint health. Kirkland Signature Flaxseed Oil comes in a 1300 mg softgel capsule and is made from organic flaxseed oil. Flaxseed oil from Kirkland Signature is also a source of lignans which are phytoestrogens that are able to regulate hormone balance and possess antioxidant properties. A small amount of vitamin E has been added to prevent oxidation.